For the enthusiast who wants to take their truck to the extreme and get an aggressive powerful sound and different look this extreme dual bolt-on cat-back exhaust is for you. Exits behind the rear tires at an angle. Every Gibson exhaust is designed to decrease backpressure and produce more torque and increased horsepower. Will not fit with a fifth wheel trailer hitch. Dyno tested results have proven increases as much as 15 Horsepower and 30Ft /Lbs of increased torque.